1. A directress; a straight line perpendicular to the axis of a conic section in relation to which its nature may be defined.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• directrixs,
• sirectrix,
• xirectrix,
• cirectrix,
• firectrix,
• rirectrix,
• eirectrix,
• durectrix,
• djrectrix,
• dkrectrix,
• dorectrix,
• d9rectrix,
• d8rectrix,
• dieectrix,
• didectrix,
• dirrectrix,
• dirctrix,
• direcrix,
• directix,
• Directixs